Warp stop-motion.



No. 627,963. v Patented July 4, I899.

W. F. ARTHUR.

WARP STOP MOTION.

(Application filed Nov. 9, 1898.)

(R0 Modal.)

WITNRgji THE NORRIS rank; co. vacuum no wnsumm'ou. o. c.

UNITED STATES PATENT OFFICE.

WILLIAM F/ARTHUR, OF LAWRENCE, MASSACHUSETTS, ASSIGNOR TO THE CROMPTON & KNOWLES LOOM WORKS, WORCESTER, MAS- SACHUSETTS.

WARP STOP-MOTION.

SPECIFICATION formingpart of Letters Patent No. 627,963, dated July 4, 1899.

Application filed November 9, 1898. Serial No. 695,928. (No model.)

To all whom, it may concern.-

Be it known that I, WILLIAM F. ARTHUR, a citizen of the United States, residing at Lawrence,,in the county of Essex and State of Massachusetts, have invented certain new and useful Improvements in Looms, of which the following is a specification.

My invention relates to looms, and more particularly to warp stop-motions of looms, in which the drop devices are .so located in the loom as not to rise and fall with the barnesses, as set out in the application for United States Letters Patent filed July 3, 1898, Serial No. 686,660, but are independent of the shedding mechanism.

I find by the practical using of warp stopmotions. which are located back of the harnesses that as heretofore constructed dirt and I lint will be collected upon the guide-bars and in the slots of the drop devices, through which the guide-bars pass, so as to encumber the operation of the motion and require-the loom to be occasionally stopped and the dirt and lint removed from the slots of the drop devices. In order to overcome this difficulty, I have placed the guide-bars above the warp and out of the way of the falling dirt, and I make the drop devices with an elongated slot near their upper ends for the guide-bar to pass through and support the drop devices in position, and a hole or opening below the slot for the passage of the warp-threads, with an elongated portion below the opening. The guide-bars are made flat to support and guide the drop devices in position, and they are fixed to or supported by suitable stands carried on the frame of the loom. Below the guide-bars, at each side of the drop devices, I place a supporting bar or rest for the warpthreads to rest upon and hold all of the drop devices supported normally approximately in the plane of the warp. These warp-supporting bars are adjacent to the sides of the drop devices, but with a free space between them to allow of the ready removal of dirt and lint which may collect during the process of weaving. By this arrangement of guidebar, drop devices, and warp rest or bar I am enabled to leave an uninterrupted space between the drop devices and the warp-supporting bar or rest.

I have shown in the drawing 'a portion of a loom sufficient to illustrate my improvements applied thereto.

In the accompanying drawing, 1 is the warpbeam, and 2 the warp-threads passing from said'beam over the back roll 3 and over the supporti ng-bars 4 and 5, upon which the warpthreads rest, and through openings 6' in the drop devices 6, and then over the front supporting-bars 7 and 8 to the harnesses (not shown) in the ordinary way.- The edges of the drop devices 6 are not contiguous to the edges or sides of the supporting-bars 5 and 7, but are parallel and adjacent thereto, and a space of more or less width is left between the adjacent edges, as shown in the drawing.

The drop devices 6 6-are provided with elongated slots 6 at their upper ends, through which the stationary transverse flattened guide-bars 9 9 extend over the warp-threads and from one side of the warp to the other. It will be understood that there is a drop device 6 for each warp-thread.

The stationary transverse bars 9 9 are made flattened, as shown in the drawing, and about half the width in a verticalplane of the length of the slots 6" in the drop devices 6. By making the bars 9 9 flat, as shown in the drawing, and locating them in the slots 6 of the drop devices 6 said bars act to guide and direct the movement in a vertical plane of each of the drop devices and hold them in their proper positions at their lower ends, so that they will be engaged by the knife or blade 10 to be hereinafter described. At the same time the bars 9 act to support the drop devices when the warp-threads break and limit their downward movement.

The normal position of the drop devices 6 is that shown at the left'in the drawing, the drop devices being held up by the warpthreads passing through the holes 6 therein in the usual way.-

In case of the breaking of a warp-thread the drop device with which the warp-thread is connected drops down by gravity to the position shown at the right in the drawing, guided by the bar 9, and the lower end of the drop device extends in the path of the knife 'or blade 10, which extends transversely across the loom from one side of the warp to the other and is supported on arms 11, fast on rock-shaft 12, to which a rocking motion is communicated by mechanism (not shown) in the ordinary way and which is connected with the shipper device of the loom to stop the loom in case the blade 10 engages with ihe drop de vices 6.

It will be understood that I do not limit myself to the exact construction shown in the drawing and above described; but any equivalent form of drop devices, as wires, may be substituted for the drop devices shown.

I have shown in the drawing two sets of guide-bars, drop devices, and supportingbars; but only one set may be used, if desired.

Having thus described my invention, what I claim as new, and desiretosecure by Letters Patent, is

1. In a warp stop-motion for looms, a series of drop devices independent of the shedding mechanism and each provided with an elongated slot, and a warp-eye below it, a flat supporting-bar passing through said elongated slot, and serving to guide the drop devices, warp rests or supporting bars located on opposite sides of the series of drop devices, and having an uninterrupted space between them, for the ready removal of lint or dirt, substantially as shown and described.

2. In a warp stop-motion for looms, a series of drop devices independent of the shedding mechanism, and each provided with an elongated slot, and a warp-eye below it, a fiat supporting-bar passing through said elongated slot, and serving to guide the drop devices, a warp rest or supporting bar located approximately in the plane of the warp when in normal position, and presentinga free space between the rest and drop devices, for the ready removal of lint and dirt, substantially as shown and described.

WILLIAM F. ARTHUR.

\Vitn esses:

HARRY G. BAKER, JAMES I. MILLIKEN. 

